Added code to throw error if another toolkit removes the event.listen handler registry but still tries to execute the handler.
Added code to throw error if another toolkit removes the
event.listen handler registry but still tries to execute
the handler.



git-svn-id: 0379125ff55d100d4edb25bd42623ccea858864b@103 c3ab02eb-571f-0410-ad69-ce51ba5a7568

mde/fleegix-js-javascript-toolkit,mde/fleegix-js-javascript-toolkit,mde/fleegix-js-javascript-toolkit